30 C. regular issue stamp "Mercury head" and 70 C. special issue "Le Puy en Velay" with overprint in Type I, proper franking on a letter from "Ghyvelde 2. 07. 1940" to Dunkirk with reverse arrival postmark from "3. 07. 1940", flawless condition, certified by Calves, Dreyfus, Roumet and expertise by Lothar Herbst VP (2025) "The condition is impeccable. The stamps are known in very small quantities, therefore they are very rare.", Michel 800.-